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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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 Posted: Mon Nov 09, 2009 2:24 pm Post subject: Vanhegan FIENDISH Nov 9 |
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Definitely a variation on the initial set of given digits, but it seems to have multiple solution possibilities.
| Code: |
+-------+-------+-------+
| 5 1 . | . 9 . | . 3 8 |
| 4 . . | . 5 . | . . 6 |
| . . . | 1 . 3 | . . . |
+-------+-------+-------+
| . 7 . | 8 1 5 | . 4 . |
| 2 9 . | 6 . 4 | . 8 1 |
| . 4 . | 3 2 9 | . 7 . |
+-------+-------+-------+
| . . . | 9 . 2 | . . . |
| 8 . . | . 3 . | . . 9 |
| 9 5 . | . 8 . | . 6 3 |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
[Edited: I awoke in the middle of the night and worked on this puzzle. It is obvious that I was still asleep. I deleted solution]
Ted
Last edited by tlanglet on Mon Nov 09, 2009 5:38 pm; edited 1 time in total |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Mon Nov 09, 2009 4:57 pm Post subject: Re: Vanhegan FIENDISH Nov 9 |
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[Edit: deleted comment and suggestion.]
Last edited by daj95376 on Wed Nov 11, 2009 6:19 pm; edited 1 time in total |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Mon Nov 09, 2009 11:34 pm Post subject: |
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| Code: | .------------------.------------------.------------------.
| 5 1 267 | 247 9 67 | 247 3 8 |
| 4 23 2379 | 27 5 8 | 127 129 6 |
| 67 8 29 | 1 46 3 | 5 29 47 |
:------------------+------------------+------------------:
| 36 7 36 | 8 1 5 | 9 4 2 |
| 2 9 5 | 6 7 4 | 3 8 1 |
| 1 4 8 | 3 2 9 | 6 7 5 |
:------------------+------------------+------------------:
| 37 36 1 | 9 46 2 | 8 5 47 |
| 8 26 247 | 5 3 167 | 1247 12 9 |
| 9 5 247 | 47 8 17 | 1247 6 3 |
'------------------'------------------'------------------' |
one of {1,3,7} must be true in the UR29 cells r23c38. in order to break up the UR...
(3)r2c3 - (3)r2c2 = (3)r7c2 - (3=7)r7c1
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(7)r2c3 - (7)r89c3 = (7)r7c1
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(1)r2c8 - (1=2)r8c8 - (2=6)r8c2 - (6=3)r7c2 - (3=7)r7c1
all prove 7 can't exist in r7c9 and solves the puzzle. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Nov 11, 2009 3:37 pm Post subject: |
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After a day of rest and a good nights sleep, I tried this puzzle again. Hopefully my solution is not totally ridiculous like the original post. 
kite on 2 with hinge in box1, which sets up a
type 1 UR29 in r23c38, which sets up a
xy-wing 3-67 with vertex in r2c3.
Ted |
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